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Citation: DU Juan, LI Song-Mei, LIU Jian-Hua, YU Mei. Corrosion Behavior of Steel A3 Influenced by Bacillus[J]. Acta Physico-Chimica Sinica, ;2010, 26(06): 1527-1534. doi: 10.3866/PKU.WHXB20100605 shu

Corrosion Behavior of Steel A3 Influenced by Bacillus

1.
Key Laboratory of Aerospace Materials and Performance, Ministry of Education, School of Materials Science and Engineering, Beihang University, Beijing 100191, P. R. China

Received Date: 5 November 2009
Available Online: 16 April 2010

Surface analysis, mass loss and electrochemical mesurements were used to investigate the corrosion behavior of steel A3 under the effect of Bacillus. Scanning electron microscopy (SEM) indicated that the presence of Bacillus resulted in a compact biofilm after 7 days of exposure, which effectively protected the coupon from being corroded by the solution. Electrochemical impedance spectroscopy (EIS) showed that the number of time constants changed from 2 to 3 and returned to 2 in the Bacillus system. The mass loss and polarization curve results showed that the activity of the bacteria determined the effectiveness of the biofilm. The protective ability of the biofilm decreased when the activity of the bacteria decreased.
- Electrochemical impedance spectroscopy,
- Bacillus,
- Microbiologically influenced corrosion,
- Surface analysis method,
- Weight loss method,
- Polarization curve
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